Assertion (A): On Increasing the current sensitivity of a galvanometer by increasing the number of turns may not necessarily increase its voltage sensitivity. Reason (R): The resistance of the coil of the galvanometer increases on increasing the number of turns. Select the most appropriate answer from the options given below:

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KollegeApply · Accepted Answer

Both A and R are true and R is the correct explanation of A. Explanation: When the number of turns in a coil is increased, the resistance of the coil increases as well. As a result, higher current sensitivity does not always equal increased voltage sensitivity. "V"_"g" = "l"_"g"/"R" ∴ if Ig ↑ & R ↑ by different amounts, then Vg may increase or decrease.

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